<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
   <style>
    body{
        margin: 0;
    }
   </style>
</head>
<body>
    <!-- <script src="https://cdn.bootcdn.net/ajax/libs/three.js/r83/three.js"></script> -->
    <script src="js/three.js"></script>
    <script src="js/GLTFLoader.js"></script>
    <script src="js/OrbitControls.js"></script>
    <script src="js/app.js"></script> 
</body>
</html>